I only ever used Roblox to troll, but if it makes you feel any better, one of my IRL friends plays it a lot and she's actually quite neurodivergent. Has a few mental health issues that I won't go into here as it's her business, but she does like the game a lot. She's tried to convince me to play too but I prefer actual games

I guess it would also depend on the game you play on Roblox. I'm guessing those "horror" games might have some non-NT people playing.